Tile molding table



April 15, 1958 o. E. GIBSON 2,830,352

TILE MoLDNG TABLE Filedv April 23, 1953 v s sheets-sheet 1 INVENToR.

wfg

o. E. GIBSON TILE MOLDING TABLE:

April 15, '195s April 15, 1958 o. E. GIBSON 2,830,352

f TILE MOLDING TABLE Filed April 2s, 195s s sheets-sheet s IN VEN TOR. v

@Zwar E. ibson Patented Apr. 15, 1958 TILE MOLDING TABLE Oliver E. Gibson, Chicago, Ill., assignor to United States Gypsum Company, Chicago, Ill., a corporation of Illinois Application April 23, 1953, Serial No. 350,619

2 Claims. (Cl. 25-42) This invention relates to -a tile moldingV table particularly one which can be manually controlled and manually, or

mechanically operated and which is adapted to the casting metal edge reinforcement. The edges usually interlock.

A tongue and groove type joint is preferred. In the case of roofs, these slabs or planks are placed over purlins and secured thereto by means of clips. While practically any cementitiousmaterial can be used to form the slab,

the industry has preferred set calcined gypsum as it isl i comparatively light in weight, is an excellent fire-proofing material, has suiiicient strength for most purposes and is of low cost. It also can be made to harden quickly thereby permitting a greater number of tile to be made with a single mold in a day. f

In preparing these planks or tile, particularly those made from set calcined gypsum, a at table is frequently employed which permits their fabrication manually. This manually operated table is actually a mold so designed as to make each operation as easy and as fast as possible. Various types of molds have been developed for this purpose which while usable still need considerable 4irnprovements such as for example: greater ease in opening the mold and removing the tile or plank and in reassembling the mold for re-use. Also a more eflicient way 'of inserting, positioning and securing the preformed edge reinforcing is needed.

It is therefore, an object of this invention to set forth an improved mold for forming cementitious planks, particularly those made from gypsum, with preformed reinforced edges.

Another object of this -invention is to disclose a manually operated or controlled table type mold which is easy to open and reassemble. n

A further object of this invention is to present a novgl means of loosening the tile from the mold prior to removal. i j

A still further object of this invention is to set forthl an improvement in inserting, positioning and securing-the preformed frame constituting the edges of the tile inthe mold.

Various other objects will readily occur to those skilled in the art of which this invention is a part after a study of the forthcoming description, accompanying drawings, and appended claims.

This invention is best understood by means of the following drawings in which like elements are given the same reference number.

Figure l is a perspective View of the tile mold forming the subject of this invention after the cementitious material has hardened with a tile on one side in a tilted position ready for removal.

Figure 2 is a cross-sectional view taken along the line 2-2 of Figure 1.

Figure 3 is a top View of the mold partially broken away.

Figure 4 is a side view of the mold.

Figure 5 illustrates the positions of the metal frame before and after aligning in the mold.

Figure 6 is a cross-sectional view taken along the line 6-6 of lFigure l showing the end positioning lugs.

Figure 7 is a section depicting the pivoted mounting of the table, the counterweights and the tile seal break-ing means.

Figure 8 shows the arrangement of levers and shafts which enables therlocking pin to be foot-released by the operator at various positions.

In'preparing a molding table following this invention, it is desirable to use two parallel -disposed cavities or molds so that two tiles or planks can be molded at one time. .A member 1 is spaced between the two molds in a xed position vand forms a part thereof. See Figure 2. This member has the grooves 2 along its longitudinal edges for receiving the tongues of the metal frames. The member 1 is attached to angle 3 by the brackets 28, the angle 3 lis part 'of the frame and is supported in any suitable manner such as by the triangular shaped legs 4. The remaining portion of each mold constitutes the tilting flat bed members 5. These members have a dat portion 6 1 forming the bottom portion of the mold and along the outside longitudinal edges thereof are attached the members 7,for fixing the edge reinforcing in place. These members ,can either be continuous strips as shown or discontinuous. In any case, a tongue 29 is provided along the insidev edge to receive the groove portion of the edge reinforcing frame. y This frame extends completely around the edges ofthe tile to be molded. Lugs 13 and 13A are positioned along each end to hold the ends of the frame in alignment, see Figure 6.` The metal frame itself is Yactually the mold. The tilting members 5 are pivoted by being attached to the brackets 8 rotating on Vshafts 23 supported by the brackets 28. The brackets 8Y extend acrossthe shaft to which are secured the arms 24 sup porting the counterweights 25. The outer edges of the tilting members 5 are secured at their centers to the Ysliding support arms 11 by means of the pivoted elements 12. These slides are capable of moving up and down through the guides 14. Extending through the inner portion of each guide is a pin 15 which engages holes in.

the sliding support arms 11 when the' tilting member is in any predetermined position such as for casting and loading. A spring 16 extends around each pin and urges it into the hole at all times thus assuring a fixed positionof the members 5 until the pin is released by the operator. The pin is released by the yoke 17 bearing against the head 30 of the pin so that an inward motion o f the yoke will withdraw the pin from the hole and compress the spring. When the pin is removed from the hole in the sliding support arm 11, the tilting member drops or raises depending on the balance of weight. The` sealbetween the castl tile and the at portion 6 is broken4 thus facilitating the removal of the tile from the mold.

This breaking of the seal takes place when the fingers 18,v whichY are nested into the portion 6 when in the normal casting' positions, movey above the surfacejhereof and against the metal frame 19 of the cast tile when the member 5 is tilted. This is accomplished by attaching the fingers 18 to the fulcrum arms 10 pivoted on the shafts 22. The lower portion of the pin rests on the 3 `9. By thsifafrangemenf; the pin vis actually eccentricall-ytmountedr Duettowthisneccentriicity, ,theerotatmgt motion of the pins and their*` arms around the shafts 9, when the member 5 is tilted', forces the pins outward from'utlie "surface ofi thef-v mold againstA the metalfframe 5 of the tile, thereby loosening it from the bed 6. Y

It is within the -seope oftl'ris'l'in'ventionf to ahavelthe coumerwe'ights -25 vso adjusted'th'atr' they counterpoisefthe tilting members 5 in such amannerthat they dropnnto til-ted position upon release of@tlepins-whenitlielfreshly 10 molded tiles are `in place; butfbring the merribers''- back'i tolthe molding position when the Etiles'fare removedand the' pin is released.A This d`oe`s1-away wi'thfithe-neee'ssity for the operator to reach down and raise the membetsto thefcasting -position aga-im 15 4It isf'preferre'd "to 'insert'itheisheetmetals-lframe; forming the edges of the tile intoV the-moldfwhilefopen in abtltetli` position as iti-'isan importanti partioff'tlisinvetxtton-ito have laj-predeterminediouter cainber' alongltheln'g'itudinal-i edges of ftheY-metal'framefsuch as illustratedkitiligmicf? 20 in' b'rolcen linesg before@ it Yisinserted into thelmoldframe? in "this carribe'r or bowed conditions couldnotbef conveniently inserted Awhile the moldl is nL the-lcatin'gl position; When the 'mo'ld fis' then"fraised'abaetezintofthe:

casting position; the bowedflongitudina'l edgesareielzmpedi 25 in place andi distorted" into a substantiallyx straight1line,l thus retrieving-fthe'-cal'n'beifv andicausing outwards against-#thefmold. The camber doesinotnehn'nl when ithetileis removed.` Framescommonly` the* pasado not 1have-lthis `outer 'caniberlandlareisubstairtllly 30 straight; thisresultsfzin .anrfinwmd':bewingzwheninie;xtreme@Y are-inthecasting 'positionfa'ndiis"higlily-'objeet1on"` i able.Y To-ioverc'omethistr itfhasalways-been neces'saryftolhplaoe; wooden spaeerfstrips inside-themoldftogforoe the lengmnY dinalfedges apartfand la'gainstlthe `mold tol-form faisttaightf- 35 line; Thisl is: anl added stepj inf `the operation;V

wooden spacer stripslmustlbe leftt'withinlrtlre tile;4 attori casting, causing-ai decreasein streng-th.l Y

Anyfwoven I:wirelmes'h-required toreinforee tl'effcetnvntia added before` the: cementitiousfl slurry` isi poured-i Bottr-` molds are poured-fat` the same "timewith: the prefrnied edge reinforcing actingi as screed guides tofforml ia; smooth surfaceon' the-top ofltheitile:v A'nysl-lrpllsrnate rial fspillsl over 'the-sidesfoffthe'm'olds and cani lbe freiitlilykr 45 scraped off; i

The cast tile.` is'permitted' to -hardensutliciently sol th'att'itf will not befinju'redwhen-removed Hte-ailment@ cred'gri formedl off Portlandicement or dried'lif of seti' ampler the edgereinforcement-iis referred to= as ibeing made `ot4 sheetmetal, othermaterialsA` canj be #used snclV as fpaper; plastics, vulcanized:A fiber or even i east? metal;

Itll is.`V possible to f dispense'` with Athe;icounte'rweightsi andl toruse mechanicalimeans such?as'pneumaticorfhydranlie 60 However, .it'ismuch `preferred to'lcarryfout thisnvention1 inthe manner 'seti forth. in de'tailtlab'ove A wide range of shapes and'l sizes -of tile-oi" plnkis can be made on1theimo'ldlfforming tlieisubjectP-dftliis invention by `a simple-variation in itsn consti'u'cti'ow'and sau-be wannabe :anni of tuisinvenaen: Hence; vthe 'Also, it is within the infenfin of'this invention to mversenthe. .arrangement ofh the4 edges of4 the frame constituting the reinforcement, in the mold so that the portion 2 of element 1 can engage the groove side of the frame instead of the tongue as shown. The other portions of the mold can be similarly changed. Various other shapes of edges can be usedfbyV merely altering'the shape of the edge reinforcementconstituting the frame.

While a particulanA embodiment otfthis invention has been .illustrated and described, it isunderstood that the,

scope oftliisinvention ist-not to be limited thereto, but to all the modifications which are contemplated by a broad interpretation of the above description and of the appended claims.

I claim: Y y l. A tile molding table for casting an edge-reinforced cementitious tile formed from a metal frame enclosing the edges of a cementitious cast encased therein, said framefhavingiiinterloeking 'opposite edges fand serving as anfledgemoldi .forr enclosing saidy cementitiousmaterial whil'iin' a=pourab1efconditioncomprising-at Hat-mold bed' mounted upon iai supportfandlframe engagingfand `position.-

ing means extending aroundthe-peripheryy oflsaidmold be'dtollcontainallftlteledges ofLsaid nietalframein fixed andfsquared reltion'fasit restsl upon saidmold bed while in-laifhorlizontl; closed',` pouring position, said frame-engagingfrnteans interlocking with theopposite longitudinal edgess'of saidirfr'ame-.when in said closed, pouring position- .an'dmeansforr'pivotallyattaching said mold'bed to said supportifortmovement ofsaidmold 4bedin an arc -froma horimnt-alwclosed,pouring position to laninclined,` open,` loadng'i'andunloadingf position; 4one of said frame engaging'llmeans; interlockingwithone of said longitudinal edgesio sadl'frame, in'stationary attachment to saidl supportrlandfin-nonengaging relation with said longitudinal edge 'of said frame when saidfmoldlbed and said frame areflfir'i saidilinclined, open,` loading and` unloading positionlvanti'ia; tile4` yseparatingmeans. positioned i within saidy moldbedilunder:saidilongitudinal edge of said framefor progressively lraisingfsaidedge as said mold bedis. moved to,saidrinclined, open, loading and unloading position,V thereby. graduallyfand uniformly breaking the adhesion betweenthe" tile and said ibed from said i longitudinal I edge tof thelother;

2;,Th'eitl'lesmolding tableclaimed in claim 1 in which saidstile separating .means comprises a fulcrum armattach'edppivotedl' 'tol and underneath said mold. bed; the

opposite end of said arm pivotedlyresting upon a stationanyvponionaofsad: molding table and afinger portion ofi :saidrarm: in an i engageable v position underA said` lungi@ tudinal.::edge-` ywhereby `saidl .fingere portion progressively raises said longitudinal edge as said mold bed is movedI lfromfsaidfponringposition to. said inclined, open, loading andunloadingI positionrthereby, gradually and uniformly breaking the adhesive between theftile andsaidbed from said longitudinal Aedge to the .t other.

References Citedin the le of this patent `UNIITED,K kSTATES PATENTS Australia Jan. 13, 1938 

